#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2017-2020 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     makeKAHIP
#
# Description
#     Build the KaHIP library (int32 only).
#
# ----------------------------------------------
# NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
#------------------------------------------------------------------------------
# Dynamic library ending (default is .so)
[ "$(uname -s)" = Darwin ] && EXT_SO=.dylib || EXT_SO=.so

# Short-circuit test for an installation
if [ "$1" = "-test" ]
then
    [ "$#" -eq 2 ] || { echo "${0##*/} -test : needs 1 argument"; exit 1; }
    dir="${2%/}" # <- *_ARCH_PATH
    [ -d "$dir/include" ] || exit 2

    package="kahip"
    libName="libkahip"
    for lib in \
        "$FOAM_EXT_LIBBIN/$libName$EXT_SO" \
        "$dir/lib/$libName.a" \
        "$dir/lib/$libName$EXT_SO" \
        "$dir/lib$WM_COMPILER_LIB_ARCH/$libName.a" \
        "$dir/lib$WM_COMPILER_LIB_ARCH/$libName$EXT_SO" \
        ;
    do
        if [ -r "$lib" ]
        then
            echo "    $package include: $dir/include"
            echo "    $package library: ${lib%/*}"
            exit 0
        fi
    done
    exit 2
fi
#------------------------------------------------------------------------------
# Run from third-party directory only
cd "${0%/*}" || exit
wmakeCheckPwd "$WM_THIRD_PARTY_DIR" 2>/dev/null || {
    echo "Error (${0##*/}) : not located in \$WM_THIRD_PARTY_DIR"
    echo "    Check your OpenFOAM environment and installation"
    exit 1
}
. etc/tools/ThirdPartyFunctions
#------------------------------------------------------------------------------
_foamConfig kahip

kahipPACKAGE=${KAHIP_VERSION:-kahip-system}
targetType=libso

#------------------------------------------------------------------------------
usage()
{
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    /bin/cat<<USAGE

Usage: ${0##*/} [OPTION] [lib|libso] [kahip-VERSION]
options:
  -gcc          Force use of gcc/g++
  -force        Force build attempt (mingw)
  -cmake PATH   With cmake from the given path
  -help

* Compile KaHIP
      $kahipPACKAGE

USAGE
    showDownloadHint KAHIP
    exit 1
}
#------------------------------------------------------------------------------
exportCompiler minimal  # Minimal compiler info for CMake/configure

unset optForce

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    '') ;;      # Ignore empty
    -h | -help) usage   ;;
    -gcc)       useGcc  ;;
    -force)     optForce=true ;;

    -cmake)
        [ "$#" -ge 2 ] || die "'$1' option requires an argument"
        CMAKE_PATH="${2%%/}"
        shift
        ;;

    lib|libso)
        targetType="$1"
        ;;

    kahip-[0-9]* | kahip-git | KaHIP_* |  KaHIP-[0-9]*)
        kahipPACKAGE="${1%%/}"
        unset KAHIP_ARCH_PATH  # Avoid inconsistency
        ;;
    *)
        die "unknown option/argument: '$1'"
        ;;
    esac
    shift
done

[ -n "$kahipPACKAGE" ] || die "The kahip-VERSION was not specified"

# Nothing to build
if _foamIsNone $kahipPACKAGE
then
    echo "Using kahip-none (skip ThirdParty build of KAHIP)"
    exit 0
elif _foamIsSystem $kahipPACKAGE
then
    echo "Using kahip-system"
    exit 0
fi

# Known build issues for mingw (uses some non-portable headers)
case "$WM_COMPILER" in
(Mingw*)
    if [ "$optForce" = true ]
    then
        echo "Warning: kahip - known compilation issues with $WM_COMPILER"
    else
        echo "Skipping kahip - known compilation issues with $WM_COMPILER"
        exit 0
    fi
    ;;
esac

requireWMakeToolchain
requireExtLibBin

#------------------------------------------------------------------------------
#
# Build KaHIP
#
#   KAHIP_ARCH_PATH  : installation directory
#   KAHIP_SOURCE_DIR : location of the original sources

KAHIP_SOURCE_DIR=$sourceBASE/$kahipPACKAGE
KAHIP_ARCH_PATH=$installBASE/$kahipPACKAGE

[ -d "$KAHIP_SOURCE_DIR" ] || {
    echo "Missing sources: '$kahipPACKAGE'"
    showDownloadHint KAHIP
    exit 2
}

#
# Manual installation
#
install()
{
    # Ensure a clean build next time
    wclean

    local bindir=$KAHIP_ARCH_PATH/bin
    local incdir=$KAHIP_ARCH_PATH/include
    local libdir=$KAHIP_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH

    mkdir -m 0755 -p $incdir

    /bin/cp -pv \
        $KAHIP_SOURCE_DIR/interface/kaHIP_interface.h \
        $incdir
}


# Newer KAHIP (>= 2.11) uses CMake,
# but unfortunately does not install include/
# nor pass through flags for 64bit indices in the header.
withCmake=true
version=$(echo "$kahipPACKAGE" | sed -e 's/^kahip[-_]*//i')
case "$version" in 2.0*) unset withCmake;; esac

if true
then
(
    echo "Starting build: $kahipPACKAGE ($targetType) using wmake"
    echo

    cd "$KAHIP_SOURCE_DIR/lib" || exit
    export GIT_DIR="$KAHIP_SOURCE_DIR/.git" # Mask seeing our own git-repo

    rm -rf "$KAHIP_ARCH_PATH"
    rm -f "$FOAM_EXT_LIBBIN/libkahip$EXT_SO"

    libdir=$KAHIP_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH

    cpMakeFiles kahip 2>/dev/null

    if [ -e ../interface ] && [ ! -e interface ]
    then
        ln -s ../interface interface
    fi

    # Place static libraries in sub-directory:
    if [ "$targetType" = lib ]
    then
        mkdir -m 0755 -p $libdir 2>/dev/null
        export FOAM_EXT_LIBBIN=$libdir
    fi

    # Location of lib sources for wmake
    export KAHIP_LIB_SRC=$PWD

    wmake -j $WM_NCOMPPROCS -s $targetType \
    && echo "Built: kahip" \
    && install
) || {
    echo "Error building: kahip"
    exit 1
}
fi

#------------------------------------------------------------------------------
